JP4403395B2 - Cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock that locks and unlocks a vehicle door lock device, and more particularly to a cylinder lock that can prevent unauthorized release of the lock device.

  A cylinder lock is generally coupled to a housing fixed to a base body such as a vehicle body and having an engagement groove, a rotor having an immersible tumbler rotatably provided in the housing, and a small diameter portion of the rotor and a locking device. It is roughly constituted by a linked unlocking member. In this configuration, when a proper key is inserted and the rotor is rotated, the tumbler is immersed in the outer peripheral surface of the rotor, and the rotor rotates in the housing. Therefore, the unlocking member also rotates together with the rotor, and the locking device can be locked and unlocked via a transmission member such as a rod.

  On the other hand, when an unauthorized key or an unauthorized instrument is inserted into the cylinder lock, the tumbler protruding from the rotor remains engaged with the engaging groove of the housing, and the rotor does not rotate and unauthorized release of the locking device is prevented. . However, if the rotor is forcibly rotated as it is, the tumbler engaged with the engaging groove of the housing may be damaged, and the rotor device may be illegally released.

Therefore, a housing fixed to the base body, a cylinder built in the housing, and a tumbler that can be retracted and engaged with the cylinder are inserted. A rotor that is disengaged and rotates within the cylinder, a fitting connection member that is axially movable together with the cylinder and is detachably fitted to the rotor, and a fitting connection member that can rotate integrally with the fitting connection member And an unlocking member connected to the lock device via a transmission member such as a rod, and provided between the housing and the cylinder, and the cylinder is moved toward the unlocking member as the cylinder rotates. A cylinder configured to move and to release the coupling between the fitting connecting member and the rotor, and a spring for biasing the fitting connecting member in a direction to fit the rotor There has been proposed (see Patent Document 1.).
JP-A-13-262875

  However, in this configuration, if the rotor is rotated with an improper key, the cylinder rotates with it and moves axially in the direction of the unlocking member, that is, toward the rear end of the rotor. Move to the axis. As a result, the engagement between the fitting connection member and the rotor can be released to prevent unauthorized release of the locking device. However, if the rotor is left at a position other than the key insertion / removal position, the connection between the rotor and the fitting connection member is prevented. Will remain released, and even if the correct key is inserted and rotated next, only the rotor will rotate and the cylinder will not rotate. Therefore, the fitting connection member will not be connected to the rotor, so normal unlocking operation cannot be performed. There was a problem.

  The present invention has been made in view of the above-described problems, and an engagement portion that engages with a rotor in a rotational direction only when the cylinder moves to the unlocking member side is provided in the cylinder, and the rotor and the cylinder Next, a normal key is inserted to rotate the rotor, and a cylinder engaged with the rotor is rotated to connect the rotor and the connecting member, thereby enabling a normal unlocking operation. The present invention relates to a cylinder lock that can prevent unauthorized release of a locking device.

  For this reason, the present invention has a housing fixed to the base, a cylinder built in the housing, and a retractable tumbler that engages with the cylinder. And a rotor that rotates in the cylinder after being detached, a connecting member that is axially movable together with the cylinder and is detachably fitted to the rotor, and a connecting member that is rotatably engaged with the connecting member. And an unlocking member connected to the locking device via a transmission member, and provided between the housing and the cylinder, and moves the previous cylinder toward the unlocking member and connects the connecting member and the rotor. Cam means for releasing, and a spring for biasing the connecting member in a direction in which the connecting member is fitted to the rotor, and only when the cylinder moves toward the unlocking member, In that a engagement portion for engaging with the direction to the cylinder to the first feature.

  A second feature is that a rotor engaging projection that engages with an engaging portion provided on the cylinder also serves as a fitting engaging portion with the connecting member.

  According to the cylinder lock according to the present invention, when the rotor is rotated by an unauthorized key operation, the cylinder is axially moved in the rear end direction of the rotor via the cam means, and the connecting member is also axially moved in the rear end direction. There is an effect that the engagement between the coupling member and the rotor can be released to prevent unauthorized release of the locking device, and even if the rotor is left in a position other than the key insertion / removal position, a regular key is inserted next. The rotor is rotated, the cylinder engaged with the rotor is rotated, and the connecting member is axially moved to the rotor side, so that the connecting member and the rotor are fitted and connected so that a normal unlocking operation can be performed. Has an effect.

  Hereinafter, the best mode for carrying out the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is an exploded perspective view showing a cylinder lock according to an embodiment of the present invention, and FIG. 2 is a perspective view of FIG. 3 is an explanatory diagram of the configuration of FIG. 1, and FIG. 4 is an explanatory sectional view of key operation of the cylinder lock according to the present invention.

  As shown in FIG. 2, a cylinder lock according to the present invention includes a housing 1 fixed to a vehicle body opening / closing portion that is a base, and a stepped rotor 2 having a tumbler that is rotatably mounted in the housing 1 and can be moved in and out. A cylindrical cylinder 3 rotatably provided between the rotor 2 and the housing 1, an unlocking member 5 connected to the rear end of the rotor 2, and a detachable attachment to the rear end of the rotor 2. The connecting member 4 and the return spring 6 are fitted to each other, and the collar 7 is disposed between the rotor 2 and the return spring 6.

  1 and 3, the front end side edge of the housing 1 has a contact portion 10 that contacts the contact surface 9 of the flange portion 8 of the rotor 2 in the circumferential direction. A trapezoidal cam crest 11 is formed in the circumferential direction so as to be opposed to the contact portion 10 in the vicinity thereof. The rotor 2 is rotatably inserted into the housing 1 from the front end side, and the rotor 2 is moved in the axial direction by the contact portion 10 of the housing 1 and the contact surface 9 of the flange portion 8 of the rotor 2. It is regulated by touching.

  As shown in FIGS. 4A and 4B, the rotor 2 is provided with a tumbler 14 that engages with an engagement groove 13 to be described later, and a key groove on the front surface of the flange portion 8. 15 is formed. By inserting a regular key into the key groove 15, the tumbler 14 is immersed and the engagement with the engagement groove 13 is released, and in the released state, the rotor 2 can be locked and unlocked by the rotation of the regular key. Become. The rotor 2 has a large diameter portion 28 on the front side extending from the flange portion 8 and a small diameter portion 12 on the rear side. A pair of engaging protrusions 16 formed in the circumferential direction are provided on both sides of the small diameter portion 12 in the vicinity of the large diameter portion 28, and an engaging recess 23 of the connecting member 4 described later and the collar 7 fitted to the connecting member 4. The engaging recess 18 is engaged. A circumferential groove 19 for fitting an E-ring 17 extending in the circumferential direction is provided at the rear end of the small diameter portion 12.

  A cylinder 3 is rotatably mounted on the large-diameter portion 28 of the rotor 2, and a cam groove 20 is formed on the front end surface of the cylinder 3, and a cam crest 11 of the housing 1 is engaged with the cam groove 20. is doing. The cam surface shape of the cam groove 20 is formed as a recess that complements the cam crest 11 so that the cylinder 3 moves in the axial direction by the cam crest height via the cam crest 11 as the cylinder 3 rotates. It has become. Engaging grooves 13 extending in the axial direction are formed on the inner surface of the cylinder 3 so as to face each other, and tumblers 14 protruding from the peripheral surface of the rotor 2 are engaged with the engaging grooves 13. A pair of engaging portions 21 that engage with the engaging protrusions 16 of the rotor 2 are formed at the rear end portion of the cylinder 3 and are engaged in the rotational direction of the rotor 2.

  The small-diameter portion 12 of the rotor 2 includes a cylindrical resin collar 7, a connecting member 4 that contacts the rear end of the cylinder 3, and a return spring 6 that constantly biases the connecting member 4 toward the cylinder 3. The rear end of the return spring 6 is in contact with the front surface of the unlocking member 5. The connecting member 4 is formed in a disc shape having an insertion hole 22, and the insertion hole 22 is provided with an engagement recess 23 corresponding to the engagement protrusion 16 of the small engagement portion 12 of the rotor 2 on the inner surface thereof. Thereby, the engagement protrusion part 16 of the small diameter part 12 is engaged with the engagement recessed part 23 of the connection member 4 so that attachment or detachment is possible. An engagement recess 18 that engages with the engagement protrusion 16 of the rotor 2 is provided at the front end portion of the resin collar 7 so as to be opposed thereto, and the small diameter portion 12 of the rotor 2 is inserted and engaged therewith. The connecting member 4 is rotatably fitted to the resin collar 7.

  Three engagement protrusions 24 extending in the axial direction are provided at predetermined positions on the back surface of the connecting member 4, and the inner side surface 25 in the circumferential direction of the three engagement protrusions 24 is a spring contact surface. . Between the return spring 6 and the rotor 2, the resin collar 7 described above is provided to prevent rust. The return spring 6 constantly urges the connecting member 4 in the direction of the housing 1 and simultaneously returns the connecting member 4 to the initial rotational position with respect to the housing 1.

  The unlocking member 5 disposed behind the coil spring 6 is formed with an engagement hole 26 into which the engagement protrusions 24 of the three connecting members 4 are engaged, and an insertion hole 27 through which the small diameter portion 12 of the rotor 2 is inserted. Has been. The small-diameter portion 12 of the rotor 2 is rotatably inserted into the insertion hole 27, and an E-ring 17 for retaining is fitted into the circumferential groove 19 of the small-diameter portion 12. In the engagement hole 26 of the unlocking member 5, the engagement protrusion 24 of the connecting member 4 is engaged in an axially movable and non-rotatable manner. That is, the unlocking member 5 can be rotated integrally with the connecting member 4 only in the direction around the axis as the connecting member 4 rotates. Further, a wire (not shown) is attached to the unlocking member 5 and connected to a lock device (not shown).

  In the above configuration, when a regular key is inserted into the key groove 15 and rotated, the tumbler 14 is retracted as shown in FIG. 4B, so that the engagement with the engagement groove 13 is released and the rotor 2 is moved. Rotate. The rotor 2, the collar 7 and the connecting member 4 rotate together, and the unlocking member 5 also rotates. As a result, locking / unlocking according to the rotational position of the rotor 2 becomes possible.

  On the other hand, when the rotary operation is performed using an unauthorized key or instrument, the tumbler 14 remains engaged with the engagement groove 13 of the cylinder 3, so that the cylinder 3 also rotates in conjunction with the rotor 2 and is released by the cam means. Since the shaft moves in the direction of the lock member 5, the coupling between the connecting member 4 and the rotor 2 is released, and the rotor 2 turns idle. Since the coupling member 4 and the rotor 2 are thus disengaged, the coupling member 4 does not rotate even when the rotor 2 rotates, and the unlocking member 5 that engages the coupling member 4 does not rotate. Unauthorized release of the locking device by an unauthorized key or instrument can be prevented.

  Here, even if an unauthorized key or instrument is removed and left at a position other than the key insertion / removal position of the rotor 2, the connecting member 4 is unlocked together with the rotor 2 as shown in FIGS. 3 (b) and 4 (c). Since the engaging projection 16 of the rotor 2 is disengaged from the engaging recess 23 of the connecting member 4 and is engaged with the engaging portion 21 of the cylinder 3, When the proper key is inserted into the key groove 15 and the rotor 2 is rotated, the cylinder 3 is also rotated, the cylinder 3 is axially moved in the direction of the housing 1 by the cam means, and the connecting member 4 is moved by the axial force of the return spring 6. Since the shaft 3 moves in the direction of the housing 1 together with the cylinder 3 and engages with the rotor 2, a normal unlocking operation is possible.

  Since the cylinder lock of the present invention is configured as described above, when the rotor is rotated by an unauthorized key or instrument, the cylinder is axially moved in the direction of the rear end of the rotor via the cam means, and at the same time, the connecting member is also moved backward. The shaft is moved in the end direction, the engagement between the connecting member and the rotor is released to prevent unauthorized release of the locking device, and even if the rotor is left in a position other than the key insertion / removal position, By inserting a key, rotating the rotor, rotating the cylinder engaged with the rotor, and axially moving the connecting member to the rotor side, the connecting member and the rotor are fitted and connected, and a normal unlocking operation is performed. it can.

It is a disassembled perspective view which shows the cylinder lock which concerns on one Example of this invention. It is a perspective view of a cylinder lock concerning one example of the present invention. It is a principal part perspective view which shows the state which a cylinder axially moves back. It is explanatory drawing sectional drawing of the key operation of the cylinder lock which concerns on one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Rotor 3 Cylinder 4 Connecting member 5 Unlocking member 6 Return spring 7 Collar 8 Flange part 9 Contact surface 10 Contact part 11 Cam mountain 12 Small diameter part 13 Engagement groove 14 Tumbler 15 Key groove 16 Engagement protrusion part 17 E-ring 18 engagement recess 19 circumferential groove 20 cam groove 21 engagement portion 22 insertion hole 23 engagement recess 24 engagement projection 25 inner side surface 26 engagement hole 27 insertion hole 28 large diameter portion

Claims (2)

  A housing fixed to the base body, a cylinder built in the housing, and a tumbler that can be moved into and out of engagement with the cylinder. The tumbler is inserted and the engagement with the cylinder is released by inserting a regular key. A rotor that rotates in the cylinder, a connecting member that is movable in the axial direction together with the cylinder, and that is detachably fitted to the rotor; An unlocking member connected to the device via a transmission member, and a cam provided between the housing and the cylinder for moving the cylinder toward the unlocking member and releasing the connection between the connecting member and the rotor And a spring that biases the connecting member in a direction to fit the connecting member with the rotor, and the rotational direction with respect to the rotor only when the cylinder moves to the unlocking member side. Cylinder lock, characterized in that a engagement portion for engaging the cylinder.   The cylinder lock according to claim 1, wherein a rotor engagement protrusion that engages with an engagement portion provided in the cylinder also serves as a fitting engagement portion with the coupling member.

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